Understanding Maps
Explore how to use maps in Go to efficiently store and retrieve key-value data. Understand declaring maps with make and literals, adding and updating entries, accessing values safely, and iterating with non-deterministic order for effective data handling.
We'll cover the following...
We'll cover the following...
Introduction
Maps are a collection of key-value pairs that a user can use to store some data and retrieve it with a key. In some languages, these are called dictionaries (Python) or hashes (Perl). In contrast to an array/slice, finding an entry in a map requires a single lookup versus iterating over the entire slice comparing values. With a large set of items, this can give us significant time savings.
Declaring a map
There are several ways to declare a map. Let's first look at using make:
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